Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b91cc72cd042b5e…

MALICIOUS

PDF

43.3 KB Created: 2020-08-20 06:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 091b50420c1e85f3a9a194d7ad373b12 SHA-1: 48961cdf3f3c4655ba40f7d3a011d26ef9068f13 SHA-256: 7b91cc72cd042b5e496285f39bcd9e847731f4cc8a464a2bbd303ace759ad309
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=old+bollywood+mkv+movies'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous shopify.com URLs, while many are benign, is likely part of a link farm strategy to improve search engine ranking for malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=old+bollywood+mkv+movies
    • http://gutemupa.dazmedia.net/uploads/1/3/2/7/132741334/142771a01486162.pdf
    • http://files.weesnerbittersweetfarm.com/uploads/1/3/1/4/131453998/lenube.pdf
    • http://files.lynnkirkham.net/uploads/1/3/0/8/130874318/6548217.pdf
    • http://zijalowag.ketonetpasim.com/uploads/1/3/2/8/132814930/5712144.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/65241974205.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/31152670894.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/lefevalupoxebumunekawez.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/91538620561.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/wing_chun_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0439/0620/3803/files/dictionnaire_des_accords_pour_guitare.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1218/files/puzuxiwelodixivetupizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/6253404488.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6732/files/zozemoteripevosu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/28550746307.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/landscape_architecture_portfolio_examples.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055a0.bin
9e6a69e8c9ee1b74dd509aed7935074959cdc64607f0c0b120e39d264c69a148		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55A0 5148 bytes
font_01_sfnt_off0000672e.bin
5638c693f4afad872c77c64293c117d5f2475c0a8f9cd6c37f3f3686cb3aa4fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672E 10384 bytes
font_02_sfnt_off00008ae5.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE5 16164 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.